Car-truck.



No. 739,910.l PATBNTD SEPT 2.9,"1903.

s. OTIS.

GAR TRUCK.

APPLIOATION FILED nn. 19. moz.

no MODEL. 2 sums-snm 1.

'Il @Gef No. 739,910. l PATENTED SEPT. 29, 1903.

v I S. OTIS.

GAR TRUCK.

LPPLIQATION FILED MAB. 19, 1902.

2 SHEETS-SHEET 2.

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72067* zzalrf j vf/ UNITED 'STATES- Patented September 29, 1903.`

l-ATENTV OFFICE.

SPENCER OTIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL PATENT HOLDING COMPANY, OF SOUTHv DAKOTA, OF RAPID CITY, SOUTH DA- KCTA, AND CHICAGO, ILLINOIS, A CORPORATION OF SOUTH DAKOTA.

CAR-TRUCK.

SPECIFICATION forming part Vof Letters Patent No, 739,910, dated September 29, 1903. Application filed March 19, i902, saai Nt. 98,908.v (No model.)

To aZZ whom, it may concern:

Be it known that I, SPENCER OTIS, acitizen of the United States, residing at Chicago, inV

the county of Cook and State of Illinois, have invented certain new and useful Improvements in Car-Trucks, of which the following is a specification.

This invention relates to that class of cartrucks which are adapted to be used in connection with railroad-cars, particularly freightcars, and especially to the construction and arrangement of the parts by'which the lurohing of the car and the endwise movement of the bolster may be permitted without racking or destruction ofthe same or any part thereof, all of which will more fully hereinafter appear.

The principal object of the invention, is to provide a simple, economical, and efficient car-truck.

A further object of the invention is to provide a car-truck with a movable bolster and swinging spring-seats, by which the lurching movement of the car may be permitted without destruction of any of the parts.

Further objects of the invention will appear from an examination of the drawings and the following descriptionvand claims.

The invention consists principally in a cartruck in which there are `combined bolstercolumns, a bolster movably mounted between the same, a spring-seat pivotally mounted in and under each end of the bolster and bolster-columns, land spring mechanism yinterposed between such spring-seats and the bolster.

The invention consists, further, in the combination of bolster-columns, a bolster movably mounted between the same, a lower spring-seat provided with upwardly-extend-` ing lateral arms pivotally mounted in and between each pairA of, bolster-columns and between the same, an upper spring-seat having a movable bearing on each lower kend of the bolster, and spring mechanism interposed between both of such spring-seats.

The invention consists, further and finally, in the features, combinations, and details of construction hereinafter described and 5o claimed.

In the accompanying drawings, Figure lis a side elevation of a car-truck constructed in is well known that when a car, particularlya refrigerator-car, is taking a curve, where the outside track is at a higher elevation than the inner track, thereis such a stress placed upon the mechanisms and parts thereof that it is liable to rack or destroy some of the parts, particularly the flanges of the carwheels. This invention is intended primarily to provide a simple, economical, and efficient cartruck whichk will permit of limited movements of certain parts, such as the bolster and spring-supporting mechanism,v and tend to permit of the car taking curves without destroying or in any way affecting the efficiency of the parts, as well as relieving the ordinary ear-wheel flanges from the tremendous strain usually accompanying the taking ofa curve. In illustrating and describing these improvements I have only illustrated and described that which I consider to be new, taken in connection with so much as is old as will properly disclose the invention to others and enable those skilled in the art to practice the same, leaving out of consideration other and Well-known mechanisms, which if illustrated and described herein would only tend to confusion, prolixity, and ambiguity.

In constructing a car-truckin accordance with these improvements-one which is provided with the usual supporting-car-wheels al and journal-boxes b-I make a pair of bolster-columns c for each side thereof, the upper ends of which are perforated, as at d, both horizontally and at an incline, so that the upper flat arch bar c may be passed therethrough and rest therein. The upper ends of each of these bolster-columns have outwardly-projecting lugs f, provided with IOO ing-bolts z' may be passed therethrough and through the lower arch-bars I To support the car-body, I provide a truckbolster 7c of any suitable construction, one

having the usual center bearings Z and end bearings m and which is movably mounted between each pair of bolster-columns. To sustain each end of the holsteiin a yielding manner and at the same time permit of its having limited endwise movements, a main spring-seat p is provided having upwardlyextending arms q at each lateral side thereof, which arms are provided with trunnions r, adapted to enter perforations s in each of the bolster-columns. Contacting a convex boss on the lower surface of each end of the bolster is a second spring-seat u, provided with a concaved recess engaging such convex boss. Arranged between both of these spring-seats is a set ot helical coil-springs o, which acts to support the upper spring-seat, and thereby each end of the bolster, in a yielding manner. The upper spring-seat above described is provided with ilanges w, forming a channel which spans the arms of the swinging springseat in such a manner that the upper springseat moves or swings necessarily with the lower one.

An examination of Fig. 3 of the drawings will show that the lateral swinging arms of the lower spring-seats are arranged to one side of the center or the trunnion or pivotal point. This arrangement is made for the purpose of permitting the spring-seat or the larger part thereof to make a downward swinging movement when the car or that side of the car is on the raised track and taking a curve. When the car is in such position, it will be known that the holster is moved endwise toward thev high part and that if the parts are arranged along a common center line the outer end or major portion of the swinging seat would rise outwardly and upwardly. The present arrangement provides a construction in which the major portion of the spring-seat goes downwardly when that side of the truck is being raised, and therefore assists in compensating for the raising ofthe trucks-that is, the entire raising movement of the truck is not' transmitted to the body of the car.

The arrangement and construction of the bolster-columns described in these improvements are such that they permit of the opposite bolster-columns on each side of the truck being connected together by a pressed-steel tie-bar y, of any convenient shape, and secured thereto by means of bolts and nuts z. The arrangement shown in Fig. l is at apoint intermediate the arch-bars; but the construction is such as topermit this tying across of the bolster-columns at any desired point or points. The arrangement shown in Fig. lis particularly convenient in that it permits of the brake-beam mechanism being attached thereto in an economical and efficient manner.

I claiml. In a car-truck ofthe class described, the combination of bolstercolumns, a bolster movably mounted between the same, and a swinging seat pivotally mounted in and between such bolster-columns under each end of the bolster at points oft center to the center of stress between the bolster and swinging seat, substantially as described.

2. In a car-truck of the class described, the combination of bolster-columns, a bolster movably mounted between the same, a lower spring-seat provided with upwardly-extending lateral arms pivotally mounted in and between each pair of bolster-columns under each end of the bolster, an upper spring-seat above each of the lower seats having a movable bearing on each end of the bolster, and spring mechanism interposed between both of such springseats, substantially as described. I

3. In a car-truck of the class described, the combination of pairs of bolster-columns, a bolster movably mounted between the same, a swinging spring-seat provided with upwardly-extending arms at each lateral side and ol center from the points where they are pivotally secured to the inner sides of each pair of the bolster-columns and between the same, and spring mechanism interposed between such spring-seat and the bolster, substantially as described.

4. In a car-truck of the class described, the combination of pairs of bolster-columns, a movable bolster havingits ends mounted between each pair of bolster-columns, a springseat provided with upwardly-extending arms arranged between each pair of bolster-columns having trunnions pivotally engaged with such bolster-columns, a second springseat having a rocker-joint connection between it and the lower surface of each end of the bolster-column, and spring mechanism interposed between each pair of such spring-seats, substantially as described.

5. In a car-truck of the class described, the combination of pairs of bolster-columns, a movable bolster having its ends arranged between each pair of bolster-columns, a main swinging spring-seat provided with upwardly-p extending arms arranged between each pair of bolster-columns provided with trunnions pivotally connected with the inner sides of such bolster-columns, a second spring-seater- IOO IIO

combination of pairs of bolster-columns, a movable bolster having its ends arranged between each pair of bolster-columns, a main swinging spring-seat provided with upwardlyextending arms arranged between each pair of bolster-columns and provided with trunnions pivotally connected with the inner sides of such bolster-columns, a second spring-seat arranged above the first-named spring-seats and having a ball-joint connection with each lower end of the bolster and provided with flanges spanning the arms on the first-named springseat, spring mechanism arranged between such spring-seats, and tie-rods connecting the bolster-columns on opposite sides of the trucksin pairs and at points intermediate the archbars, substantially as described.

'7. In a car-truck of the class described, the combination of a pair of bolster-columns at eachsidethereof provided with transverse perforations at their upper end and outwardly-extending lugs provided with dowelpins, an arch-bar passed through such perforations resting on the vlugs and provided with perforations engaging the dowel-pins, an inclined recess and perforation on the inner andV lower side of each of the bolster-columns, bolt mechanism passed through such lower perforations, and lower arch-bars through'which the bolt mechanism is also passed secured to the lower ends of the bolster-columns, substantially as described.

8. In a car-truck of the class described, the combination ot' a pair of bolster-columns at each side thereof provided with transverse perforations at their upper end and outwardly-extending lugs provided with dowelpins, an arch-bar passed through such perforations resting on the lugs and provided withl SPENCER OTIS.

Witnesses:

THOMAS F. SHERIDAN, HARRY IRWIN CROMER. 

